No.vo.sphin.go'bi.um. L. masc. adj. novus new; N.L. neut. n. Sphingobium a bacterial genus; N.L. neut. n. Novosphingobium a new Sphingobium . Proteobacteria / Alphaproteobacteria / Sphingomonadales / Sphingomonadaceae / Novosphingobium The genus Novosphingobium accommodates Gram‐negative, aerobic, nonsporulating, chemoorganotrophic, and rod‐shaped bacteria which are metabolically versatile. The members of this genus have been isolated from a wide range of ecological habitats including soil, coastal and freshwater sediments, deep‐sea environments, groundwater, wastewater treatment plants, activated sludge, contaminated groundwater, bioremediation reactor, hexachlorocyclohexane‐contaminated soil, oil‐contaminated sites, polychlorinated‐dioxin‐contaminated environments, rice seeds, rhizosphere, and plants. Morphologically, the colonies are mostly yellow in color, convex, circular, and smooth. Most of these isolates can be subcultured on R2A agar and may or may not be catalase‐ and oxidase‐positive. Similarly, they may or may not reduce nitrate into nitrite. C 18:1 ω7 c is the major fatty acid present in the membranes of the genus Novosphingobium . The major quinone is ubiquinone‐10, while the major polyamine is spermidine. The major polar lipids observed in Novosphingobium are diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylmethylethanolamine, sphingoglycolipid, and phosphatidylcholine. The DNA G + C content ( mol% ): varies between 57.7 and 69.1, lowest in the case of Novosphingobium marinum and highest in the case of Novosphingobium bradum . DNA G + C content (mol%): 57.7–69.1. Type species: Novosphingobium capsulatum (Leifson 1962) Takeuchi et al. 2001.

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